login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A123003 G.f.: (8-29*x+24*x^2)/((1-4*x)*(1-3*x)*(1-2*x)^2*(1-x)^2). 1
8, 75, 463, 2394, 11274, 50265, 216581, 912648, 3788560, 15565095, 63484779, 257591862, 1041276566, 4197718965, 16888451857, 67845945636, 272258886492, 1091657974275, 4374492890615, 17521540911570, 70156842333538, 280839342481425, 1123993155149853 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..22.

E. Rodney Canfield and Herbert S. Wilf, Counting permutations by their runs up and down, arXiv:math/0609704 [math.CO], 2006; See u_4.

MATHEMATICA

LinearRecurrence[{13, -67, 175, -244, 172, -48}, {8, 75, 463, 2394, 11274, 50265}, 23] (* Jean-Fran├žois Alcover, Oct 08 2018 *)

CROSSREFS

Cf. A059427, A000352, A060158.

Sequence in context: A166084 A123661 A288487 * A015578 A145600 A268085

Adjacent sequences:  A123000 A123001 A123002 * A123004 A123005 A123006

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Nov 09 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 11 22:31 EST 2019. Contains 329046 sequences. (Running on oeis4.)